factory_bot provides a framework and DSL for defining and using factories - less error-prone, more explicit, and all-around easier to work with than fixtures.

Fixtures aren't fun. Machinist is.

Fixture killer

FixtureBuilder allows testers to use their existing factories, like FactoryGirl, to generate high performance fixtures that can be shared across all your tests and development environment. The best of all worlds! Speed, Maintainability, Flexibility, Consistency, and Simplicity!

Spawn is a very small library (just 14 lines of code) that can effectively replace fixtures or any other library for the same task.

Test::Unit begot MiniTest; factory_girl begets Miniskirt.

FixtureReplacement is a Rails plugin that provides a simple way to quickly populate your test database with model objects without having to manage multiple, brittle fixture files. You can easily set up complex object graphs (with models which reference other models) and add new objects on the fly.

Lightweight flexible factories for Ruby and Rails testing.

Object creation methods everyone already has

DataMapper plugin for building pseudo random models

Create repeatable seed fixtures that you can continually use and deploy to multiple environments and tenants.

Transactionata: Transactional dynamic test data for Rails Tests. Set up your models and factories in a block that will be executed once and then rolled back by hooking into ActiveRecord's built-in fixture transactions

Fabrication is an object generation framework for ActiveRecord, Mongoid, DataMapper, Sequel, or any other Ruby object.

Awesome replacement for factories and fixtures that focuses on being DRY and making developers type as little as possible.